package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import service.CollectService;
import util.JsonTools;

public class CollectServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public CollectServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html");
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		PrintWriter out = response.getWriter();
		
		// 收藏夹车的增、删、改、查
		String action = request.getParameter("action");
		String userName = request.getParameter("userName");
		String goodsId = request.getParameter("goodsId");
		System.out.println(action + "-" + userName + "-" + goodsId);
		String result = "failed";
		try {
			if ("add".equals(action)) {
				if (!CollectService.selectItem(userName, goodsId)) {// 如果购物车中没有该商品
					result = CollectService.addItem(userName, goodsId);
				} else {// 如果购物车中有该商品
					result = "alreadyHave";
				}
			} else if ("delete".equals(action)) {
				result = CollectService.deleteItem(userName, goodsId);
			} else if ("deleteAll".equals(action)) {
				result = CollectService.deleteAll(userName);
			} else if("selectAll".equals(action)){
				result = JsonTools.createJsonString(CollectService.selectAll(userName));
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		out.print(result);
		out.flush();
		out.close();

		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
